Q: What is the sum of all factors of the number 77,987 excluding 77,987?
A: 18,109
The factors of the number 77,987 are: 1, 7, 13, 91, 857, 5999, 11141, 77987.
If you add them up, you will get the total of 78,005. Now subtract 77,987 to get 18,109